somewhere in america, the toughest questions are answered every day. because somewhere in america, more than sixty thousand people spend every day answering them. siemens. answers. >>> and liftoff of the united launch alliance atlas v rocket. >> this may look like an ordinary rocket launch but this is a top secret plane on its way to space. it's x-37. the military is using it as a way to test new equipment, sensors and materials in space without using astronauts. the x-37 can stay in orbit for up to nine months. the unmanned spacecraft will conduct classified experiments for the government. >>> do cell phones cause cancer? european researchers have launched a major study hoping to find out. it's called the cohort study on mobile communications, csmos for short. they hope to find any connection between cell phone use and cancer as well as neurological diseases like alzheimer's and parkinson's. >>> it's 6:2. 55 degrees. >>> new developments in the d.c. mass shooting. >> police make two arrests but drop charges against the 14-year-old. and the families of